JP4784821B2 - Laser welded structure of resin parts - Google Patents

Laser welded structure of resin parts Download PDF

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JP4784821B2
JP4784821B2 JP2005330390A JP2005330390A JP4784821B2 JP 4784821 B2 JP4784821 B2 JP 4784821B2 JP 2005330390 A JP2005330390 A JP 2005330390A JP 2005330390 A JP2005330390 A JP 2005330390A JP 4784821 B2 JP4784821 B2 JP 4784821B2
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resin member
laser
region
resin
laser beam
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JP2007136731A (en
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久義 奥谷
康多 齋藤
実 肥田
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Aisin Corp
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Aisin Seiki Co Ltd
Aisin Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1606—Ultraviolet [UV] radiation, e.g. by ultraviolet excimer lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1616—Near infrared radiation [NIR], e.g. by YAG lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7377—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline
    • B29C66/73771—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being amorphous
    • B29C66/73772—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being amorphous the to-be-joined areas of both parts to be joined being amorphous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7377—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline
    • B29C66/73773—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being semi-crystalline
    • B29C66/73774—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being semi-crystalline the to-be-joined areas of both parts to be joined being semi-crystalline
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/954—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the thickness of the parts to be joined

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

本発明は、レーザ光の透過性が高い樹脂材料で構成した第１部材と、前記レーザ光の吸収性が高い樹脂材料で構成した第２部材とを押圧しつつ重ね、前記第１部材の側から前記第２部材の側に前記レーザ光を照射して、前記第１部材と前記第２部材とを溶着する樹脂部材のレーザ溶着部構造、および、各種装置を収容する収容空間を形成すべく、前記レーザ光の透過性が高い樹脂材料で構成した第１部材と、前記レーザ光の吸収性が高い樹脂材料で構成した第２部材とをレーザ溶着して構成した収容容器、に関する。   According to the present invention, the first member made of a resin material having a high laser beam permeability and the second member made of a resin material having a high laser beam absorbency are stacked while being pressed, and the first member side The laser beam is irradiated on the second member side to form a laser welding part structure of a resin member for welding the first member and the second member, and an accommodation space for accommodating various devices. Further, the present invention relates to a storage container configured by laser welding a first member made of a resin material having high laser beam transmissivity and a second member made of a resin material having high laser beam absorbency.

近年、軽量化及び低コスト化等を図るため、自動車部品などの部品や各種装置を収容する収容容器等は樹脂材で形成することが多い。予め複数に分割した分割樹脂部材を互いに接合して樹脂成形品とすると、樹脂成形品の生産性を高めることができる。
樹脂材同士の接合方法として、レーザ溶着法、熱風溶着法、超音波溶着法等が公知である。特にレーザ溶着法では、接合部位であるレーザ溶着部に沿うように局所的に熱を加えるため、他の場所に熱による悪影響を及ぼし難く、樹脂部材が不意に変形するのを防止しながら、溶着することができる。 In recent years, in order to reduce weight and cost, a container such as an automobile part or a container for housing various devices is often formed of a resin material. If the divided resin members divided into a plurality of parts are joined together to form a resin molded product, the productivity of the resin molded product can be increased.
Known methods for joining resin materials include laser welding, hot-air welding, and ultrasonic welding. In particular, in the laser welding method, since heat is locally applied along the laser welding portion that is a joining site, it is difficult to adversely affect other places due to heat, and the resin member is prevented from being deformed unexpectedly. can do.

特許文献１〜２には、レーザ光に対して透過性のある透過性樹脂部材とレーザ光に対して吸収性のある吸収性樹脂部材とを接合するレーザ溶着法が開示してある。
概説すると、これら樹脂部材を接合部位が隙間無く当接するように圧着した後、透過性樹脂部材の側から吸収性樹脂部材の側にレーザ光を照射する。透過性樹脂部材の内部を透過したレーザ光が当接面に到達したとき、レーザ光の有するエネルギは吸収性樹脂部材によって吸収される。これにより、吸収性樹脂部材が加熱される。一方、透過性樹脂部材は、レーザ光によって直接に加熱されるものではなく、吸収性樹脂部材からの伝熱により加熱される。そして、透過性樹脂部材と吸収性樹脂部材との当接面で樹脂部材同士が互いに溶融状態となって溶け込み、固化することで両樹脂部材が接合する。 Patent Documents 1 and 2 disclose a laser welding method in which a transparent resin member that is transparent to laser light and an absorbent resin member that is absorbable to laser light are joined.
In general, after these resin members are pressure-bonded so that the joint portions are in contact with no gap, laser light is irradiated from the transparent resin member side to the absorbent resin member side. When the laser light transmitted through the inside of the transparent resin member reaches the contact surface, the energy of the laser light is absorbed by the absorbent resin member. Thereby, an absorptive resin member is heated. On the other hand, the transmissive resin member is not directly heated by the laser beam, but is heated by heat transfer from the absorbent resin member. Then, the resin members are melted and melted together at the contact surface between the permeable resin member and the absorbent resin member, and the two resin members are joined together.

特開２００４−２０９９１６号公報JP 2004-209916 A 特開２００５−１２１６号公報JP 2005-1216 A

例えば透過性樹脂部材は、その表面が種々の形状を呈することにより、その部位によって厚みが変化している場合がある。また、製造工程の都合上、未溶着の樹脂部材同士を他の装置に組み付けた後にレーザ溶着する場合、樹脂部材とレーザ光源との間に、レーザ光を遮る他物が存在することがある。これらの場合に透過性樹脂部材の側から吸収性樹脂部材の側にレーザ光を照射すると、吸収性樹脂部材の側に到達するレーザ光の透過量は、吸収性樹脂部材の部位によって異なることとなる。   For example, the thickness of the permeable resin member may vary depending on the portion of the surface having various shapes. In addition, for the convenience of the manufacturing process, when laser welding is performed after assembling unwelded resin members to another apparatus, there may be another object that blocks the laser light between the resin member and the laser light source. In these cases, when laser light is irradiated from the transparent resin member side to the absorbent resin member side, the amount of transmitted laser light reaching the absorbent resin member side varies depending on the part of the absorbent resin member. Become.

透過性樹脂部材と吸収性樹脂部材とを接合するのに十分なレーザ光が到達しない部位では、各樹脂材の加熱の程度が不十分となる。このとき、当該部位では樹脂部材同士の十分な溶け込みが行われない。レーザ溶着部において部分的に溶け込みができない領域が存在する場合、当該領域では、透過性樹脂部材と吸収性樹脂部材とが接当し合い、接合に十分なレーザ光が到達している部位での各樹脂材同士の溶け込みを妨げる。そのため、レーザ溶着部の全体に亘って十分な溶け込みが行われず、必要な溶着強度が確保できないという問題点があった。   In a portion where laser light sufficient to join the transmissive resin member and the absorbent resin member does not reach, the degree of heating of each resin material becomes insufficient. At this time, sufficient melting between the resin members is not performed at the portion. When there is a region that cannot be partially melted in the laser welded portion, the transparent resin member and the absorbent resin member are brought into contact with each other in the region, and the laser beam that has reached a sufficient laser beam for joining is used. This prevents the resin materials from melting together. Therefore, there has been a problem that sufficient welding strength cannot be ensured because sufficient welding is not performed over the entire laser welding portion.

従って、本発明の目的は、レーザ溶着部において、必要な溶着強度を確実に得ることができる樹脂部材のレーザ溶着部構造および収容容器を提供することにある。   Accordingly, an object of the present invention is to provide a resin member laser welded part structure and a container which can reliably obtain the necessary welding strength in the laser welded part.

上記目的を達成するための本発明に係る樹脂部材のレーザ溶着部構造は、レーザ光の透過性が高い樹脂材料で構成した第１部材と、前記レーザ光の吸収性が高い樹脂材料で構成した第２部材とを押圧しつつ重ね、前記第１部材の側から前記第２部材の側に前記レーザ光を照射して、前記第１部材と前記第２部材とを溶着するものであって、その第一特徴構成は、前記レーザ光の照射方向に沿った前記第１部材の厚みがレーザ照射線に沿った所定の領域ごとに変化するとき、前記レーザ光を照射する前の状態において、前記厚みが所定寸法以下の領域では前記第１部材と前記第２部材とを接触させ、前記厚みが所定寸法よりも大きい領域では前記第１部材と前記第２部材とを離間させた点にある。   In order to achieve the above object, the laser welded portion structure of the resin member according to the present invention is composed of a first member made of a resin material having a high laser beam transmittance and a resin material having a high laser beam absorbability. While pressing the second member, the laser beam is irradiated from the first member side to the second member side, and the first member and the second member are welded, The first characteristic configuration is that when the thickness of the first member along the irradiation direction of the laser light changes for each predetermined region along the laser irradiation line, in the state before the laser light irradiation, The first member and the second member are brought into contact with each other in a region where the thickness is equal to or smaller than a predetermined dimension, and the first member and the second member are separated from each other in a region where the thickness is larger than the predetermined dimension.

上記第一特徴構成によれば、前記厚みが所定寸法以下の領域では、レーザ光の透過量が十分であるため、第１部材と第２部材とを接触させておくと、第１部材と第２部材とが互いに溶け込むことで、確実な接合が行われる。   According to the first characteristic configuration, since the amount of transmitted laser light is sufficient in the region where the thickness is equal to or smaller than the predetermined dimension, if the first member and the second member are kept in contact with each other, As the two members melt together, reliable joining is performed.

一方、前記厚みが所定寸法よりも大きい領域では、レーザ光の透過量が不十分であるため、樹脂材同士の十分な溶着が期待できない。つまり、この領域では、第１部材および第２部材は、互いに十分溶け込むことができない状態となる。しかし、本構成のように、この領域においては、第１部材と第２部材とを予め離間させておくため、レーザ光の透過量が十分な領域における樹脂部材同士の溶け込みを妨げない。   On the other hand, in a region where the thickness is larger than a predetermined dimension, the amount of laser light transmitted is insufficient, so that sufficient welding between the resin materials cannot be expected. That is, in this region, the first member and the second member cannot be sufficiently melted with each other. However, as in this configuration, in this region, the first member and the second member are separated from each other in advance, so that the melting of the resin members in the region where the laser beam transmission amount is sufficient is not hindered.

前記厚みが所定寸法よりも大きい領域では、樹脂部材同士の接合は行われないが、前記厚みが所定寸法よりも小さい領域において確実な接合が行われるため、当該領域のみの接合であっても必要な強度を得ることができる。   In the region where the thickness is larger than the predetermined dimension, the resin members are not bonded to each other. However, since the bonding is surely performed in the region where the thickness is smaller than the predetermined dimension, it is necessary even if only the region is bonded. High strength can be obtained.

本発明に係る樹脂部材のレーザ溶着部構造の第二特徴構成は、前記第１部材に対する前記レーザ照射線を略環状に構成した点にある。   The 2nd characteristic structure of the laser welding part structure of the resin member which concerns on this invention exists in the point which comprised the said laser irradiation line with respect to the said 1st member in the substantially cyclic | annular form.

上記第二特徴構成によれば、例えばレーザ光の照射をレーザ溶着部にくり返し行う場合、レーザ光源を一方向に周回させるようにして照射し、各樹脂部材の加熱の程度を全体に亘って略均一な条件とすることができる。そのため、レーザ溶着部に沿って樹脂部材同士の溶け込みが略均等となり、健全なレーザ溶着部を得ることができる。   According to the second characteristic configuration, for example, when the laser beam irradiation is repeatedly performed on the laser welded portion, the laser light source is irradiated so as to circulate in one direction, and the degree of heating of each resin member is substantially reduced over the whole. Uniform conditions can be obtained. Therefore, the melt of the resin members becomes substantially uniform along the laser welded portion, and a sound laser welded portion can be obtained.

以下、本発明の実施例を図面に基づいて説明する。
本発明は、樹脂部材同士をレーザ光によって確実に溶着するための樹脂部材のレーザ溶着部の構造である。樹脂部材は、レーザ光の透過性が高い第１部材（以下、透過性樹脂部材と称する）と、レーザ光の吸収性が高い第２部材（以下、吸収性樹脂部材と称する）とを用いる。そして、透過性樹脂部材および吸収性樹脂部材を押圧しつつ重ね合わせ、透過性樹脂部材の側から吸収性樹脂部材の側にレーザ光を照射すると、透過性樹脂部材と吸収性樹脂部材との当接面同士が加熱溶融して両者が互いに溶け込み、溶着する。 Embodiments of the present invention will be described below with reference to the drawings.
The present invention is a structure of a laser welding portion of a resin member for surely welding resin members with laser light. As the resin member, a first member having a high laser beam permeability (hereinafter referred to as a transparent resin member) and a second member having a high laser beam absorbency (hereinafter referred to as an absorptive resin member) are used. When the transparent resin member and the absorbent resin member are pressed and overlapped, and the laser beam is irradiated from the transparent resin member side to the absorbent resin member side, the contact between the transparent resin member and the absorbent resin member is achieved. The contact surfaces are heated and melted, and both melt and weld together.

本発明の樹脂部材のレーザ溶着部の構造は、例えば、透過性樹脂部材の表面が種々の形状を呈するなどにより、その部位によってレーザ光の透過量が異なる場合等に適用できる。
「レーザ光の透過量が異なる」とは、上述したように樹脂部材の構造に起因する他に、樹脂部材の材質が均一でない場合等にも起こりうる。この場合にも、本発明の樹脂部材のレーザ溶着部の構造を適用することができる。
以下に、自動車の回転角度計測装置に本発明のレーザ溶着部の構造を適用した場合について説明する。 The structure of the laser welding portion of the resin member of the present invention can be applied to, for example, a case where the transmission amount of the laser light varies depending on the portion of the surface of the transparent resin member due to various shapes.
“The laser beam transmission amount is different” may be caused by the structure of the resin member as described above, or may be caused when the material of the resin member is not uniform. Also in this case, the structure of the laser welding part of the resin member of the present invention can be applied.
Below, the case where the structure of the laser welding part of this invention is applied to the rotation angle measuring device of a motor vehicle is demonstrated.

図１〜６に、自動車のブレーキペダルの踏み込み量を回転角度に変換して電気信号として取得する回転角度計測装置Ｚの概略図を示す。回転角度計測装置Ｚは、透過性樹脂部材および吸収性樹脂部材をレーザ溶着し、後述の感磁素子（各種装置の具体例）等を収容する収容空間を形成した収容容器の一例である。   1 to 6 show schematic views of a rotation angle measuring device Z that obtains an electric signal by converting a depression amount of a brake pedal of an automobile into a rotation angle. The rotation angle measuring device Z is an example of a storage container in which a transmissive resin member and an absorbent resin member are laser-welded to form a storage space for storing a magnetosensitive element (specific examples of various devices) and the like to be described later.

回転角度計測装置Ｚには、装置本体に対して軸芯Ｘ上で回転自在に支持した回転軸１に操作アーム２が備えてあり、この操作アーム２の軸芯Ｘ周りでの回転角度を計測してコネクタ部Ｃから出力する。この回転開度計測装置Ｚは、ブレーキペダルの操作系以外にアクセルペダルや各種レバー類の操作量を計測するために用いても良い。   The rotation angle measuring device Z includes an operation arm 2 on a rotation shaft 1 that is rotatably supported on the axis X with respect to the apparatus body, and measures the rotation angle of the operation arm 2 around the axis X. And output from the connector C. This rotation opening degree measuring device Z may be used for measuring the operation amount of the accelerator pedal and various levers in addition to the operation system of the brake pedal.

図２〜３に示すように、回転角度計測装置Ｚの装置本体は、回転軸１と一体的に回転する永久磁石Ｍを備えた作動ユニットＡと、この永久磁石Ｍからの磁束が作用する位置に配置された２つのホールＩＣ（Ｓ：後述する２つのホールＩＣの上位概念・感磁素子の一例）を備えた感磁ユニットＢとを連結した構造を有する。本実施形態では感磁素子としてホールＩＣを用いているが、ホール素子やＭＲ素子を用いても良い。また、感磁素子は１つ或いは３つ以上であってもかまわない。
この回転角度計測装置では２つのホールＩＣ（Ｓ）の一方を主として用い、他方をバックアップとして用いており、何れのホールＩＣ（Ｓ）を用いた場合でも等しい計測結果を得るようにホールＩＣ（Ｓ）を同じ方向に向けて重ね合わせる形態で使用している。しかし、ホールＩＣの相対位置関係はこれに限定されるものではなく、他の形態であってもかまわない。 As shown in FIGS. 2 to 3, the apparatus main body of the rotation angle measuring device Z includes an operation unit A including a permanent magnet M that rotates integrally with the rotating shaft 1, and a position where a magnetic flux from the permanent magnet M acts. And a magnetic sensing unit B provided with two Hall ICs (S: an upper concept of two Hall ICs described later and an example of a magnetic sensing element). In this embodiment, a Hall IC is used as the magnetosensitive element, but a Hall element or an MR element may be used. The number of magnetosensitive elements may be one or three or more.
In this rotational angle measuring device, one of the two Hall ICs (S) is mainly used and the other is used as a backup, and the Hall IC (S) is obtained so that the same measurement result can be obtained regardless of which Hall IC (S) is used. ) Are stacked in the same direction. However, the relative positional relationship of the Hall ICs is not limited to this, and other forms may be used.

作動ユニットＡを形成する基材は透過性樹脂部材であり、感磁ユニットＢを形成する基材は吸収性樹脂部材である。これらの樹脂部材をレーザ溶着する。   The base material forming the operating unit A is a permeable resin member, and the base material forming the magnetic sensitive unit B is an absorptive resin member. These resin members are laser-welded.

＜樹脂部材の構造＞
（透過性樹脂部材を基材とする作動ユニットＡ）
作動ユニットＡは、軸芯Ｘを中心とするディスク状の樹脂製の支持体（透過性樹脂部材）１０を備えると共に、この支持体１０に一体的に形成したボス部１１に回転軸１を遊転支承している。この支持体１０の周部には感磁ユニットＢの方向に張り出すスリーブ部１２を一体形成し、表面側には軸芯Ｘを中心とした円弧状の保護リブ１３と、回転角度計測装置Ｚを他物に固定するための一対の固定部１４とを一体形成している。固定部１４には、ネジ等を挿通させるための孔部が設けてある。尚、保護リブ１３は、他物を固定するための位置決めにも用いられる。 <Structure of resin member>
(Operation unit A based on a permeable resin member)
The operation unit A includes a disk-shaped resin support (transparent resin member) 10 centering on the shaft core X, and the rotating shaft 1 is allowed to play on a boss 11 formed integrally with the support 10. I have transferred. A sleeve portion 12 projecting in the direction of the magnetic sensing unit B is integrally formed on the peripheral portion of the support 10, and an arc-shaped protective rib 13 centering on the shaft core X and a rotation angle measuring device Z are formed on the surface side. Are integrally formed with a pair of fixing portions 14. The fixing part 14 is provided with a hole for inserting a screw or the like. The protective rib 13 is also used for positioning for fixing other objects.

透過性樹脂部材である支持体１０（以下、支持体および透過性樹脂部材は共通の符号１０で表す）のスリーブ部１２の内側には、吸収性樹脂部材とレーザ溶着する部位である第一当接部１０ａを有する。本実施形態では、第一当接部１０ａがフラットな態様を例示する。しかし、これに限られるものではなく、凸設する態様としてもよい。   Inside the sleeve portion 12 of the support 10 which is a permeable resin member (hereinafter, the support and the permeable resin member are represented by a common reference numeral 10), a first contact which is a part to be laser-welded with the absorbent resin member is provided. It has a contact portion 10a. In this embodiment, the 1st contact part 10a illustrates a flat aspect. However, it is not restricted to this, It is good also as a mode which protrudes.

第一当接部１０ａは、吸収性樹脂部材に対応する環状となるように形成してある。このとき、透過性樹脂部材１０に対するレーザ照射線Ｌは略環状となる（図６参照）。
このように構成すると、レーザ光の照射をレーザ溶着部にくり返し行う場合、レーザ光源を一方向に周回させるようにして照射し、各樹脂部材の加熱の程度を全体に亘って略均一な条件とすることができる。この場合、透過性樹脂部材１０と吸収性樹脂部材とは互いに押圧されているが、全体に亘って略均一な加熱条件であるため、両樹脂部材が一定の相対移動することで近接することができ、健全なレーザ溶着部を得ることができる。 The first contact portion 10a is formed to have an annular shape corresponding to the absorbent resin member. At this time, the laser irradiation line L with respect to the transparent resin member 10 is substantially annular (see FIG. 6).
With this configuration, when the laser beam irradiation is repeatedly performed on the laser welded portion, the laser light source is irradiated so as to circulate in one direction, and the degree of heating of each resin member is substantially uniform over the entire condition. can do. In this case, the permeable resin member 10 and the absorptive resin member are pressed against each other. However, since the heating conditions are substantially uniform throughout, the two resin members may come close to each other by a certain relative movement. And a sound laser weld can be obtained.

透過性樹脂部材１０は、使用するレーザ光の波長領域におけるレーザ光吸収率を低く構成してある。例えば、透過性樹脂部材１０は、ポリプチレンテレフタレート（ＰＢＴ）・ポリエチレンテレフタレート（ＰＥＴ）等のポリエステル樹脂・ポリエチレン・ポリプロピレン等のポリオレフィン樹脂・ポリアミド樹脂・塩化ビニル樹脂・フッ素樹脂等を構成材とすることができる。尚、透過性樹脂部材１０は、レーザ光の透過性が吸収性樹脂部材に比べて相対的に高いものであれば、特に限定されるものではない。   The transparent resin member 10 is configured to have a low laser light absorption rate in the wavelength region of the laser light to be used. For example, the permeable resin member 10 is made of a polyester resin such as polyethylene terephthalate (PBT) or polyethylene terephthalate (PET), a polyolefin resin such as polyethylene or polypropylene, a polyamide resin, a vinyl chloride resin, or a fluorine resin. Can do. The transmissive resin member 10 is not particularly limited as long as the laser beam permeability is relatively higher than that of the absorbent resin member.

透過性樹脂部材１０には、レーザ光を吸収しないか、吸収しにくい物質を強化材として含むことができる。このような強化材としてはガラス繊維、ナイロン繊維等が例示される。第一当接部１０ａの厚みは、特に限定されるものではない。   The transparent resin member 10 can contain a material that does not absorb or hardly absorbs laser light as a reinforcing material. Examples of such a reinforcing material include glass fiber and nylon fiber. The thickness of the first contact portion 10a is not particularly limited.

尚、作動ユニットＡは、回転軸１の外端側に操作アーム２を連結し、この回転軸１の内端側に鉄やニッケル合金等の磁性体で成るカップ状のヨーク１５を連結した構造を有している。
操作アーム２の揺動端には軸芯Ｘと平行姿勢となる折り曲げ部２Ａを形成し、この折り曲げ部２Ａに対してペダル等からの操作力が作用する形態で使用される。また、ヨーク１５の内周面には非磁性体の素材で成るリング状部材１６を取り付けており、このリング状部材１６に複数の永久磁石Ｍを備えることで、このヨーク１５で磁気回路を形成している。また、支持体１０と前記ヨーク１５との間に夫々を離間させる方向に付勢力を作用させると同時に、操作アーム２に復元方向に付勢力を作用させる圧縮コイルバネ１７を介装している。 The operating unit A has a structure in which the operating arm 2 is connected to the outer end side of the rotating shaft 1 and a cup-shaped yoke 15 made of a magnetic material such as iron or nickel alloy is connected to the inner end side of the rotating shaft 1. have.
A bending portion 2A that is parallel to the axis X is formed at the swinging end of the operation arm 2, and an operation force from a pedal or the like acts on the bending portion 2A. Further, a ring-shaped member 16 made of a non-magnetic material is attached to the inner peripheral surface of the yoke 15, and a magnetic circuit is formed by the yoke 15 by providing the ring-shaped member 16 with a plurality of permanent magnets M. is doing. Further, a compression coil spring 17 is provided between the support 10 and the yoke 15 so as to apply a biasing force in the direction of separating the yoke 15 and the operation arm 2 in the restoring direction.

（吸収性樹脂部材を基材とする感磁ユニットＢ）
感磁ユニットＢは、銅合金で成る複数のリードフレームＦ（導体の一例）をインサートした樹脂の成形物で成るプレート部２０を形成する。このプレート部２０の端部にコネクタ部Ｃを形成し、プレート部２０の表面側に形成した突出部２１の内部において軸芯Ｘを挟む位置に前記２つのホールＩＣ（Ｓ）を備える。プレート部２０の表面側に軸芯Ｘを中心とする樹脂製の筒状部２２（吸収性樹脂部材）を一体的に突出形成した構造を有している。 (Magnetic sensing unit B based on absorbent resin member)
The magnetic sensing unit B forms a plate portion 20 made of a resin molding in which a plurality of lead frames F (an example of a conductor) made of a copper alloy are inserted. A connector portion C is formed at the end of the plate portion 20, and the two Hall ICs (S) are provided at positions where the shaft core X is sandwiched inside the protruding portion 21 formed on the surface side of the plate portion 20. The plate portion 20 has a structure in which a resin-made cylindrical portion 22 (absorbent resin member) having an axis X as a center is integrally formed on the surface side of the plate portion 20.

吸収性樹脂部材２２（以下、筒状部および吸収性樹脂部材は共通の符号２２で表す）は、透過性樹脂部材１０の第一当接部１０ａとレーザ溶着する第二当接部２２ａを有する。第二当接部２２ａは、透過性樹脂部材１０と吸収性樹脂部材２２とを圧着させたとき隙間なく圧接する。また、第二当接部２２ａの幅は、例えば筒状部２２の幅と同等に形成すると、透過性樹脂部材１０への伝熱効率に優れたものとなる。   The absorptive resin member 22 (hereinafter, the cylindrical part and the absorptive resin member are represented by a common reference numeral 22) have a second abutting part 22a that is laser-welded with the first abutting part 10a of the permeable resin member 10. . The second contact portion 22a is in pressure contact with the permeable resin member 10 and the absorbent resin member 22 without any gap when they are pressure-bonded. Moreover, if the width | variety of the 2nd contact part 22a is formed equivalent to the width | variety of the cylindrical part 22, for example, it will become the thing excellent in the heat-transfer efficiency to the permeable resin member 10. FIG.

吸収性樹脂部材２２は、使用するレーザ光の波長領域におけるレーザ光に対して吸収性を有する樹脂材料とする。
レーザ溶着時における第一当接部１０ａと第二当接部２２ａとの溶着性を考慮すると、第二当接部２２ａは、できるだけ第一当接部１０ａと同じ組成の樹脂、あるいは、第一当接部１０ａと組成が異なっても相溶性の高い樹脂を基材とすることが好ましい。
レーザ光の吸収性が高い吸収性樹脂部材２２は、透過性樹脂部材１０として例示した各樹脂に、レーザ光の波長領域におけるレーザ光の吸収効率が高い添加物を含有することができる。レーザ光吸収効率が高い添加物は、例えばカーボンブラック・黒鉛粉末等のカーボン系粉末・染料・顔料等が例示される。当該添加物は、例えば、重量比で０．０５〜１．０％含有する。 The absorptive resin member 22 is a resin material that is absorptive with respect to laser light in the wavelength region of the laser light to be used.
In consideration of the weldability between the first contact portion 10a and the second contact portion 22a at the time of laser welding, the second contact portion 22a is made of resin having the same composition as the first contact portion 10a as much as possible. It is preferable to use a highly compatible resin as a base material even if the composition is different from the contact portion 10a.
The absorptive resin member 22 having high laser beam absorptivity can contain an additive having high laser beam absorption efficiency in the wavelength region of the laser beam in each resin exemplified as the transmissive resin member 10. Examples of the additive having high laser light absorption efficiency include carbon-based powders such as carbon black and graphite powder, dyes and pigments. The additive contains, for example, 0.05 to 1.0% by weight.

吸収性樹脂部材２２の外径は、作動ユニットＡのスリーブ部１２の内径と一致させている。吸収性樹脂部材２２の外端部をスリーブ部１２に内嵌させ、吸収性樹脂部材２２の端部を透過性樹脂部材１０に接触させることにより、作動ユニットＡと感磁ユニットＢとを連結固定している。この連結固定は、レーザ光を用いたレーザ溶着法により行う。   The outer diameter of the absorbent resin member 22 is matched with the inner diameter of the sleeve portion 12 of the operation unit A. The outer end portion of the absorbent resin member 22 is fitted into the sleeve portion 12 and the end portion of the absorbent resin member 22 is brought into contact with the permeable resin member 10 so that the operation unit A and the magnetic sensitive unit B are connected and fixed. is doing. This coupling and fixing is performed by a laser welding method using laser light.

即ち、透過性樹脂部材１０と吸収性樹脂部材２２とを圧接した状態で、透過性樹脂部材１０の側からレーザ光を照射したとき、吸収性樹脂部材２２にレーザ光の熱エネルギが蓄積される。そして、この熱が透過性樹脂部材１０に伝熱し、透過性樹脂部材１０と吸収性樹脂部材２２とが溶融する。このとき、これら樹脂材は、当接部位において対向する樹脂材の方向に沈み込むことで互いに溶着する。   That is, when laser light is irradiated from the transparent resin member 10 side in a state where the transparent resin member 10 and the absorbent resin member 22 are pressed, thermal energy of the laser light is accumulated in the absorbent resin member 22. . Then, this heat is transferred to the permeable resin member 10, and the permeable resin member 10 and the absorbent resin member 22 are melted. At this time, these resin materials are welded to each other by sinking in the direction of the opposing resin material at the contact portion.

（レーザ溶着部の構造）
透過性樹脂部材１０には、固定部１４が設けてある。つまり、レーザ光の照射方向に沿った透過性樹脂部材１０の厚みがレーザ照射線Ｌに沿った所定の領域ごとに変化する。即ち、透過性樹脂部材１０の側から吸収性樹脂部材２２の側にレーザ光を照射すると、吸収性樹脂部材２２の側に到達するレーザ光の透過量は、吸収性樹脂部材２２の部位によって異なる。このような場合においても、必要な溶着強度を確保するため、本発明では以下の構成を有する。 (Laser welded structure)
The transmissive resin member 10 is provided with a fixing portion 14. That is, the thickness of the transmissive resin member 10 along the laser light irradiation direction changes for each predetermined region along the laser irradiation line L. That is, when laser light is irradiated from the transparent resin member 10 side to the absorbent resin member 22 side, the amount of laser light transmitted to the absorbent resin member 22 side varies depending on the site of the absorbent resin member 22. . Even in such a case, the present invention has the following configuration in order to ensure the necessary welding strength.

即ち、図７に示したように、レーザ光を照射する前の状態において、前記厚みＴが所定寸法以下の領域αでは透過性樹脂部材１０と吸収性樹脂部材２２とを接触させ、前記厚みＴが所定寸法よりも大きい領域βでは透過性樹脂部材１０と吸収性樹脂部材２２とを離間させてある。   That is, as shown in FIG. 7, in the state before the laser light irradiation, the transparent resin member 10 and the absorbent resin member 22 are brought into contact with each other in the region α in which the thickness T is a predetermined dimension or less, and the thickness T Is larger than the predetermined dimension, the transparent resin member 10 and the absorbent resin member 22 are separated from each other.

本実施形態で、「前記厚みＴが所定寸法以下の領域α」とは、固定部１４のリブ１４ａを設けていない領域を意味する。この領域αでは、透過性樹脂部材１０と吸収性樹脂部材２２とを接触させてレーザ光を透過性樹脂部材１０の側から吸収性樹脂部材２２の側に照射させたとき、透過性樹脂部材１０と吸収性樹脂部材２２とを接合するのに十分なレーザ光が吸収性樹脂部材２２に到達する。   In the present embodiment, “the region α in which the thickness T is equal to or smaller than a predetermined dimension” means a region where the rib 14 a of the fixing portion 14 is not provided. In this region α, when the transparent resin member 10 and the absorbent resin member 22 are brought into contact with each other and the laser light is irradiated from the transparent resin member 10 side to the absorbent resin member 22 side, the transparent resin member 10. The laser beam sufficient to join the absorbent resin member 22 reaches the absorbent resin member 22.

一方、「前記厚みＴが所定寸法よりも大きい領域β」とは、例えば固定部１４のリブ１４ａを設けた領域である。この領域βでは、透過性樹脂部材１０と吸収性樹脂部材２２とを接触させてレーザ光を透過性樹脂部材１０の側から吸収性樹脂部材２２の側に照射させたとき、透過性樹脂部材１０と吸収性樹脂部材２２とを接合するのに十分なレーザ光が吸収性樹脂部材２２に到達せず、各樹脂材の加熱の程度が不十分となる。   On the other hand, the “region β in which the thickness T is larger than a predetermined dimension” is, for example, a region in which the rib 14 a of the fixing portion 14 is provided. In this region β, when the transparent resin member 10 and the absorbent resin member 22 are brought into contact with each other and laser light is irradiated from the transparent resin member 10 side to the absorbent resin member 22 side, the transparent resin member 10. The laser beam sufficient to join the absorbent resin member 22 does not reach the absorbent resin member 22 and the degree of heating of each resin material becomes insufficient.

従って、前記厚みＴが所定寸法以下の領域αでは、レーザ光の透過量が十分であるため、透過性樹脂部材１０と吸収性樹脂部材２２とを接触させておくと、透過性樹脂部材１０と吸収性樹脂部材２２とが互いに溶け込むことで、確実な接合が行われる。
一方、前記厚みＴが所定寸法よりも大きい領域βでは、レーザ光の透過量が不十分であるため、樹脂材同士の十分な溶着が期待できない。しかし、この領域βにおいては、透過性樹脂部材１０と吸収性樹脂部材２２とを予め離間させておくため、レーザ光の透過量が十分な領域における樹脂部材同士の溶け込みを妨げない。 Accordingly, in the region α where the thickness T is equal to or less than a predetermined dimension, the amount of laser light transmitted is sufficient. Therefore, when the transparent resin member 10 and the absorbent resin member 22 are kept in contact with each other, As the absorbent resin member 22 melts together, reliable bonding is performed.
On the other hand, in the region β in which the thickness T is larger than a predetermined dimension, the amount of laser light transmitted is insufficient, so that sufficient welding between the resin materials cannot be expected. However, in this region β, the transparent resin member 10 and the absorbent resin member 22 are separated from each other in advance, so that the melting of the resin members in the region where the amount of transmitted laser light is sufficient is not hindered.

前記厚みＴが所定寸法よりも大きい領域βでは、樹脂部材同士の接合は行われないが、前記厚みＴが所定寸法以下の領域αにおいて確実な接合が行われるため、当該領域αのみの接合であっても必要な強度を得ることができる。   In the region β where the thickness T is larger than the predetermined dimension, the resin members are not joined to each other, but since the thickness T is reliably joined in the region α where the thickness T is equal to or smaller than the predetermined dimension, only the region α is joined. Even if it exists, required intensity | strength can be obtained.

前記厚みＴが所定寸法よりも大きい領域βにおいて、透過性樹脂部材１０と吸収性樹脂部材２２との離間距離は、レーザ溶着が完了した後であっても、透過性樹脂部材１０と吸収性樹脂部材２２との非当接状態を維持するように構成する。仮に、レーザ溶着時に、非当接状態が直ちに当接状態となると、その時点で両樹脂部材が近接できず、十分な溶け込みが行われないからである。しかし、上述のように離間距離を設定すれば、樹脂材同士の溶着が可能な領域においては、両樹脂部材が確実に圧接され、健全なレーザ溶着部を得ることができる。   In the region β in which the thickness T is larger than a predetermined dimension, the separation distance between the transparent resin member 10 and the absorbent resin member 22 is such that the transparent resin member 10 and the absorbent resin can be separated even after the laser welding is completed. The non-contact state with the member 22 is maintained. This is because if the non-contact state immediately becomes a contact state at the time of laser welding, the resin members cannot be brought close to each other at that time, and sufficient melting is not performed. However, if the separation distance is set as described above, in a region where the resin materials can be welded together, both the resin members are surely pressed and a sound laser welded portion can be obtained.

また、レーザ照射線Ｌにおいてレーザ溶着部と未溶着部とが混在する場合であっても、レーザ照射をある一定の条件で行うことで、健全なレーザ溶着部を得ることができる。   Further, even when the laser welded portion and the unwelded portion are mixed in the laser irradiation line L, a sound laser welded portion can be obtained by performing laser irradiation under certain conditions.

（レーザ）
レーザ光の光源としては、特に限定されないが、半導体レーザ・ＹＡＧレーザ等を光源とし、遠赤外線領域・可視光領域等の波長のものが使用できる。レーザ光の波長としては、３００〜２５００ナノメートル、特に７９０〜１１００ナノメートルのものが好ましく使用できる。 (laser)
The light source of the laser beam is not particularly limited, but a semiconductor laser, a YAG laser, or the like can be used as the light source, and a laser having a wavelength in the far infrared region, visible light region, or the like can be used. As the wavelength of the laser beam, a wavelength of 300 to 2500 nanometers, particularly 790 to 1100 nanometers can be preferably used.

（収容容器について）
上述したように、回転角度計測装置Ｚは、感磁素子等を収容する収容空間を形成した収容容器の一例である。本実施形態では、レーザ溶着部ができるだけ広い面積で設定できるように以下のように構成してある。
即ち、図６〜７に示したように、透過性樹脂部材１０からから延出する固定部１４の一部に、吸収性樹脂部材２２に対して照射するレーザ光が透過するレーザ光透過部を設定してある。本実施形態では、前記厚みＴが所定寸法よりも大きい領域βであるリブ１４ａをレーザ光透過部の一例とすることができる。つまり、このリブ１４ａは、レーザ照射線Ｌに存在するため、レーザ光が透過する領域である。 (Container)
As described above, the rotation angle measuring device Z is an example of a storage container in which a storage space for storing a magnetosensitive element or the like is formed. In the present embodiment, the laser welding part is configured as follows so that the laser welding part can be set as wide as possible.
That is, as shown in FIGS. 6 to 7, a laser beam transmitting portion through which the laser beam irradiated to the absorbent resin member 22 is transmitted to a part of the fixing portion 14 extending from the transparent resin member 10. It is set. In the present embodiment, the rib 14a that is the region β in which the thickness T is larger than a predetermined dimension can be taken as an example of the laser beam transmitting portion. That is, since the rib 14a exists in the laser irradiation line L, it is a region through which the laser light is transmitted.

そして、図５〜７に示したように、当該レーザ光透過部（リブ１４ａ）が平板形状であって、その平面方向をレーザ光の照射方向と平行に、且つ、レーザ照射線Ｌの方向に対して交差するように構成してある。
この構成では、レーザ光は平板形状のリブ１４ａの側面（図７における上方）から照射することとなる。そのため、レーザ光の透過量を減少させる透過性樹脂部材１０の部位（リブ１４ａ）をできるだけ小さくでき、レーザ溶着部を広く確保することができる。 As shown in FIGS. 5 to 7, the laser beam transmitting portion (rib 14 a) has a flat plate shape, and the plane direction thereof is parallel to the laser beam irradiation direction and in the direction of the laser irradiation line L. It is configured to cross each other.
In this configuration, the laser light is emitted from the side surface (upper side in FIG. 7) of the plate-shaped rib 14a. Therefore, the part (rib 14a) of the transmissive resin member 10 that reduces the amount of transmitted laser light can be made as small as possible, and a wide laser welded portion can be secured.

本実施形態の回転角度計測装置Ｚは、例えば自動車に取り付けて用いる。そのため、振動によって透過性樹脂部材１０が捩じれる虞がある。
レーザ光透過部であるリブ１４ａは、前記厚みＴが所定寸法よりも大きいため、レーザ光が吸収性樹脂部材２２に届かず、樹脂部材同士の接合は行われない。しかし、リブ１４ａによって透過性樹脂部材１０の剛性が向上するため、樹脂部材同士の接合が行われなくとも、上述した捩じれを防止できる構成となる。 The rotation angle measuring device Z of the present embodiment is used by being attached to, for example, an automobile. Therefore, the permeable resin member 10 may be twisted by vibration.
Since the thickness T of the rib 14a which is a laser beam transmitting portion is larger than a predetermined dimension, the laser beam does not reach the absorbent resin member 22, and the resin members are not joined to each other. However, since the rigidity of the permeable resin member 10 is improved by the rib 14a, the above-described twist can be prevented even if the resin members are not joined to each other.

本発明の樹脂部材のレーザ溶着部構造は、透過性樹脂部材と吸収性樹脂部材とをレーザ溶着する際に、透過性樹脂部材の表面が種々の形状を呈するなどにより、その部位によってレーザ光の透過量が異なり、透過性樹脂部材と吸収性樹脂部材とを接合するのに十分なレーザ光が吸収性樹脂部材に到達しない領域がある場合に適用できる。   The laser welded portion structure of the resin member of the present invention is such that when the transparent resin member and the absorptive resin member are laser welded, the surface of the transparent resin member exhibits various shapes. The present invention can be applied to a case where there is a region where the amount of transmission is different and sufficient laser light does not reach the absorbent resin member to join the transparent resin member and the absorbent resin member.

本発明の樹脂部材のレーザ溶着部構造を用いた回転角度計測装置の上面視概略図Schematic top view of a rotation angle measuring device using the laser welding structure of the resin member of the present invention 本発明の樹脂部材のレーザ溶着部構造を用いた回転角度計測装置の断面図Sectional drawing of the rotation angle measuring device using the laser welding part structure of the resin member of this invention 上記回転角度計測装置の分解断面図Exploded sectional view of the rotation angle measuring device 作動ユニットの概略図Schematic diagram of the operating unit 作動ユニットと感磁ユニットとの組付態様を示す図The figure which shows the assembly | attachment aspect of an operation unit and a magnetic sensing unit 回転角度計測装置の上面要部概略図Schematic diagram of the main part of the top surface of the rotation angle measurement device 透過性樹脂部材と吸収性樹脂部材とのレーザ溶着態様を示す図The figure which shows the laser welding aspect of a permeable resin member and an absorptive resin member

符号の説明Explanation of symbols

１０ 透過性樹脂部材（第１部材）
２２ 吸収性樹脂部材（第２部材）
α 厚みが所定寸法以下の領域
β 厚みが所定寸法よりも大きい領域
Ｌ レーザ照射線
Ｔ 厚み
Ｚ 回転角度計測装置（収容容器） 10 Transparent resin member (first member)
22 Absorbent resin member (second member)
α Region where thickness is less than predetermined dimension β Region where thickness is larger than predetermined dimension Laser irradiation line T Thickness Z Rotational angle measuring device (container)

Claims (2)

レーザ光の透過性が高い樹脂材料で構成した第１部材と、前記レーザ光の吸収性が高い樹脂材料で構成した第２部材とを押圧しつつ重ね、前記第１部材の側から前記第２部材の側に前記レーザ光を照射して、前記第１部材と前記第２部材とを溶着する樹脂部材のレーザ溶着部構造であって、
前記レーザ光の照射方向に沿った前記第１部材の厚みがレーザ照射線に沿った所定の領域ごとに変化するとき、
前記レーザ光を照射する前の状態において、前記厚みが所定寸法以下の領域では前記第１部材と前記第２部材とを接触させ、前記厚みが所定寸法よりも大きい領域では前記第１部材と前記第２部材とを離間させてある樹脂部材のレーザ溶着部構造。 A first member made of a resin material having a high laser beam permeability and a second member made of a resin material having a high laser beam absorbency are stacked while being pressed, and the second member from the side of the first member. A laser welding part structure of a resin member that irradiates the laser beam on the member side and welds the first member and the second member,
When the thickness of the first member along the irradiation direction of the laser light changes for each predetermined region along the laser irradiation line,
In a state before irradiating the laser beam, the first member and the second member are brought into contact with each other in a region where the thickness is equal to or smaller than a predetermined dimension, and the first member and the second member are contacted in a region where the thickness is larger than a predetermined dimension. The laser welding part structure of the resin member which is spaced apart from the second member. 前記第１部材に対する前記レーザ照射線が略環状に構成してある請求項１に記載の樹脂部材のレーザ溶着部構造。 The laser welding part structure of the resin member according to claim 1, wherein the laser irradiation line with respect to the first member is configured in a substantially annular shape .
JP2005330390A 2005-11-15 2005-11-15 Laser welded structure of resin parts Expired - Fee Related JP4784821B2 (en)

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